:root {
  --color-site: #119bda;
  --color-site-light: #62c8f5;
  --color-background: #000000;
  --color-surface: rgba(255, 255, 255, 0.035);
  --color-surface-hover: rgba(255, 255, 255, 0.06);
  --color-text-primary: #e8eef4;
  --color-text-secondary: #9fb0c0;
  --color-muted: #6f8294;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-active: rgba(17, 155, 218, 0.55);
  --color-purple: #a855f7;
  --color-blue: #3b82f6;
  --color-success: #35c98f;
  --color-danger: #ff6577;
  --header-height: 74px;
  --container-width: 1220px;
  --content-width: 880px;
  --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--color-background);
  color: var(--color-text-primary);
  font-family: "Vazirmatn", sans-serif;
}

body.toc-is-open,
body.lightbox-is-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

::selection {
  background: rgba(17, 155, 218, 0.3);
  color: #ffffff;
}

/* Aurora */

.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.aurora-bg::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    radial-gradient(
      circle at 50% 0%,
      rgba(17, 155, 218, 0.13),
      transparent 38%
    ),
    linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.08),
      rgba(0, 0, 0, 0.88) 65%,
      #000000
    );
}

.aurora-effect {
  position: absolute;
  width: 760px;
  height: 760px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.34;
  will-change: transform;
}

.aurora-effect--primary {
  background: radial-gradient(
    circle,
    var(--color-purple),
    transparent 68%
  );
  animation: aurora-primary 17s ease-in-out infinite;
}

.aurora-effect--secondary {
  background: radial-gradient(
    circle,
    var(--color-blue),
    transparent 68%
  );
  animation: aurora-secondary 14s ease-in-out infinite;
  animation-delay: -6s;
}

.aurora-grid {
  position: absolute;
  inset: 0;
  opacity: 0.14;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

@keyframes aurora-primary {
  0%,
  100% {
    transform: translate(-20%, -26%) scale(1);
    opacity: 0.3;
  }

  38% {
    transform: translate(28%, 12%) scale(1.12);
    opacity: 0.44;
  }

  72% {
    transform: translate(50%, -8%) scale(0.9);
    opacity: 0.26;
  }
}

@keyframes aurora-secondary {
  0%,
  100% {
    transform: translate(62vw, 40vh) scale(0.9);
    opacity: 0.28;
  }

  42% {
    transform: translate(34vw, -18vh) scale(1.14);
    opacity: 0.4;
  }

  75% {
    transform: translate(76vw, 24vh) scale(1);
    opacity: 0.45;
  }
}

/* Icons */

.ui-icon {
  position: relative;
  display: inline-block;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
}

.ui-icon::before,
.ui-icon::after {
  position: absolute;
  content: "";
}

.ui-icon--back::before {
  top: 5px;
  right: 3px;
  width: 10px;
  height: 10px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(45deg);
}

.ui-icon--back::after {
  top: 9px;
  right: 4px;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.ui-icon--list::before {
  top: 3px;
  right: 2px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  box-shadow: 0 6px currentColor, 0 12px currentColor;
}

.ui-icon--close::before,
.ui-icon--close::after {
  top: 9px;
  right: 2px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.ui-icon--close::before {
  transform: rotate(45deg);
}

.ui-icon--close::after {
  transform: rotate(-45deg);
}

.ui-icon--external::before {
  top: 4px;
  right: 4px;
  width: 11px;
  height: 11px;
  border: 2px solid currentColor;
  border-radius: 3px;
}

.ui-icon--external::after {
  top: 2px;
  right: 1px;
  width: 8px;
  height: 8px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
}

.ui-icon--down::before {
  top: 4px;
  right: 5px;
  width: 9px;
  height: 9px;
  border-left: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
}

/* Header */

.page-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 14px 18px 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.72),
    rgba(0, 0, 0, 0.2)
  );
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.page-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(var(--container-width), 100%);
  min-height: var(--header-height);
  margin: 0 auto;
  padding: 0 18px;
  border-bottom: 1px solid var(--color-border);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}

.site-brand__logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.site-brand__name {
  overflow: hidden;
  font-size: 1rem;
  font-weight: 900;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 15px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  transition:
    color var(--transition),
    background var(--transition),
    transform var(--transition);
}

.header-btn:hover {
  color: var(--color-site);
  background: rgba(255, 255, 255, 0.035);
  transform: translateY(-2px);
}

.toc-open-btn {
  display: none;
}

/* Layout */

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: start;
  gap: 58px;
  width: min(var(--container-width), calc(100% - 32px));
  margin: 0 auto;
  padding: 54px 0 110px;
}

.project-content {
  order: 1;
  min-width: 0;
}

.desktop-toc {
  order: 2;
}

.desktop-toc__sticky {
  position: fixed;
  top: 112px;
  padding-right: 18px;
  border-right: 1px solid var(--color-border);
}

.desktop-toc__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  color: var(--color-text-primary);
  font-weight: 900;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.toc-nav a {
  position: relative;
  display: block;
  padding: 8px 0;
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  transition:
    color var(--transition),
    transform var(--transition);
}

.toc-nav a::before {
    display: none;
  position: absolute;
  top: 50%;
  right: -22px;
  width: 2px;
  height: 0;
  border-radius: 2px;
  background: var(--color-site);
  content: "";
  transform: translateY(-50%);
  transition: height var(--transition);
}

.toc-nav a:hover,
.toc-nav a.is-active {
  color: var(--color-site);
  transform: translateX(-4px);
}

.toc-nav a.is-active::before {
  height: 22px;
}

/* Hero */

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  align-items: center;
  gap: 48px;
  min-height: 560px;
  padding: 30px 0 78px;
}

.hero__content {
  order: 1;
}

.hero__visual {
  position: relative;
  order: 2;
  display: grid;
  place-items: center;
  min-height: 260px;
}

.hero__logo-glow {
  position: absolute;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: var(--color-site);
  filter: blur(75px);
  opacity: 0.24;
}

.hero__logo-box {
  position: relative;
  display: grid;
  place-items: center;
  width: 170px;
  height: 170px;
  overflow: hidden;
  /* border: 1px solid rgba(255, 255, 255, 0.11); */
  border-radius: 42px;
  /* background:
    linear-gradient(
      145deg,
      rgba(255, 255, 255, 0.09),
      rgba(255, 255, 255, 0.025)
    ); */
  /* box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.45),
    inset 0 1px rgba(255, 255, 255, 0.08); */
  transform: rotate(-4deg);
}

.hero__logo {
  width: 112px;
  height: 112px;
  object-fit: contain;
  transform: rotate(4deg);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  width: fit-content;
  margin-bottom: 18px;
  color: var(--color-site);
  font-size: 0.9rem;
  font-weight: 900;
  direction: ltr;
}

.eyebrow__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 18px currentColor;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3rem, 7vw, 6.1rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
  direction: ltr;
  text-align: right;
}

.hero h1 span {
  color: var(--color-site);
}

.hero__description {
  max-width: 740px;
  margin: 26px 0 0;
  color: var(--color-text-secondary);
  font-size: 1.07rem;
  line-height: 2.15;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 30px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 50px;
  padding: 0 19px;
  border-radius: 999px;
  font-size: 0.93rem;
  font-weight: 800;
  transition:
    color var(--transition),
    background var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.primary-btn {
  background: var(--color-site);
  color: #ffffff;
  box-shadow: 0 12px 35px rgba(17, 155, 218, 0.2);
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 42px rgba(17, 155, 218, 0.3);
}

.secondary-btn {
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.025);
  color: var(--color-text-secondary);
}

.secondary-btn:hover {
  border-color: var(--color-border-active);
  color: var(--color-site);
  transform: translateY(-3px);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 28px;
  color: var(--color-muted);
  font-size: 0.82rem;
  direction: ltr;
  justify-content: flex-end;
}

/* Stats */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-card {
  position: relative;
  min-width: 0;
  padding: 30px 24px;
}

.stat-card:not(:last-child) {
  border-left: 1px solid var(--color-border);
}

.stat-card__number {
  color: var(--color-text-primary);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  line-height: 1;
}

.stat-card__unit {
  margin-right: 4px;
  color: var(--color-site);
  font-size: 0.84rem;
  font-weight: 800;
}

.stat-card p {
  margin: 11px 0 0;
  color: var(--color-muted);
  font-size: 0.82rem;
  line-height: 1.8;
}

/* Sections */

.content-section {
  padding: 88px 0;
  border-bottom: 1px solid var(--color-border);
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 17px;
  margin-bottom: 30px;
}

.section-heading__index {
  padding-top: 8px;
  color: var(--color-site);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  font-weight: 900;
  direction: ltr;
}

.section-heading__eyebrow {
  display: block;
  margin-bottom: 6px;
  color: var(--color-muted);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  direction: ltr;
  text-align: right;
}

.section-heading h2 {
  margin: 0;
  color: var(--color-text-primary);
  font-size: clamp(1.7rem, 4vw, 2.75rem);
  line-height: 1.45;
  letter-spacing: -0.04em;
}

.section-intro {
  max-width: 800px;
  margin: -4px 0 35px;
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 2.15;
}

p {
  color: var(--color-text-secondary);
  line-height: 2.05;
}

strong {
  color: var(--color-text-primary);
}

/* Timeline */

.timeline {
  position: relative;
  margin-top: 46px;
}

.timeline::before {
  position: absolute;
  top: 8px;
  right: 6px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--color-site),
    var(--color-border),
    transparent
  );
  content: "";
}

.timeline-item {
  position: relative;
  padding: 0 38px 54px 0;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item__marker {
  position: absolute;
  top: 8px;
  right: 0;
  z-index: 1;
  width: 13px;
  height: 13px;
  border: 3px solid #000000;
  border-radius: 50%;
  background: var(--color-site);
  box-shadow: 0 0 0 1px var(--color-site);
}

.timeline-item--danger .timeline-item__marker {
  background: var(--color-danger);
  box-shadow: 0 0 0 1px var(--color-danger);
}

.timeline-item--success .timeline-item__marker {
  background: var(--color-success);
  box-shadow: 0 0 0 1px var(--color-success);
}

.timeline-item__content {
  max-width: 790px;
}

.timeline-item__label {
  display: block;
  margin-bottom: 5px;
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.timeline-item__content h3 {
  margin: 0 0 13px;
  color: var(--color-text-primary);
  font-size: 1.25rem;
}

.timeline-item__content p {
  margin: 0 0 13px;
  font-size: 0.98rem;
}

.detail-list {
  display: grid;
  gap: 8px;
  margin: 20px 0;
  padding: 0;
  list-style: none;
}

.detail-list li {
  position: relative;
  padding-right: 18px;
  color: var(--color-text-secondary);
  line-height: 1.9;
}

.detail-list li::before {
  position: absolute;
  top: 14px;
  right: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-danger);
  content: "";
}

/* Architecture */

.architecture-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 13px;
  margin: 40px 0;
}

.architecture-card {
  min-width: 0;
  min-height: 160px;
  padding: 23px;
  border: 1px solid var(--color-border);
  border-radius: 22px;
  background: var(--color-surface);
  text-align: left;
}

.architecture-card--active {
  border-color: var(--color-border-active);
  background:
    linear-gradient(
      145deg,
      rgba(17, 155, 218, 0.12),
      rgba(17, 155, 218, 0.025)
    );
}

.architecture-card__tag {
  color: var(--color-site);
  font-size: 0.73rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.architecture-card h3 {
  margin: 22px 0 7px;
  color: var(--color-text-primary);
  font-size: 1.03rem;
}

.architecture-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.76rem;
  line-height: 1.7;
}

.architecture-connector {
  color: var(--color-site);
  font-size: 1.35rem;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.tech-card {
  min-width: 0;
  padding: 25px;
  border-top: 1px solid var(--color-border-active);
  background: linear-gradient(
    to bottom,
    rgba(17, 155, 218, 0.055),
    transparent
  );
}

.tech-card__number {
  color: var(--color-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.74rem;
}

.tech-card h3 {
  margin: 22px 0 6px;
  color: var(--color-text-primary);
  font-size: 1rem;
}

.tech-card strong {
  display: block;
  color: var(--color-site);
  font-size: 0.9rem;
  direction: ltr;
  text-align: right;
}

.tech-card p {
  margin: 14px 0 0;
  color: var(--color-muted);
  font-size: 0.84rem;
  line-height: 1.9;
}

/* Features */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background: var(--color-border);
}

.feature-card {
  min-width: 0;
  min-height: 190px;
  padding: 25px;
  background: rgba(0, 0, 0, 0.94);
  transition:
    background var(--transition),
    transform var(--transition);
}

.feature-card:hover {
  z-index: 1;
  background: rgba(17, 155, 218, 0.07);
}

.feature-card__number {
  color: var(--color-site);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 900;
}

.feature-card h3 {
  margin: 31px 0 9px;
  color: var(--color-text-primary);
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.82rem;
  line-height: 1.9;
}

/* Presigned URL */

.highlight-block {
  position: relative;
  margin: 36px 0 50px;
  padding: 29px 30px;
  overflow: hidden;
  border-right: 3px solid var(--color-site);
  background: linear-gradient(
    to left,
    rgba(17, 155, 218, 0.09),
    transparent 75%
  );
}

.highlight-block__label {
  display: block;
  margin-bottom: 17px;
  color: var(--color-site);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  direction: ltr;
  text-align: right;
}

.highlight-block p {
  margin: 0 0 15px;
  font-size: 0.98rem;
}

.highlight-block p:last-child {
  margin-bottom: 0;
}

.subsection-heading {
  margin-bottom: 22px;
}

.subsection-heading span {
  color: var(--color-site);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  direction: ltr;
}

.subsection-heading h3 {
  margin: 6px 0 0;
  color: var(--color-text-primary);
  font-size: 1.25rem;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.security-grid li {
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 58px;
  padding: 11px 16px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 0.86rem;
  line-height: 1.8;
}

.check-icon {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: rgba(53, 201, 143, 0.11);
  color: var(--color-success);
  font-size: 0.75rem;
  font-weight: 900;
}

.info-note {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 25px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border);
}

.info-note__icon {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  border: 1px solid var(--color-border-active);
  border-radius: 50%;
  color: var(--color-site);
  font-family: serif;
  font-weight: 900;
}

.info-note p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.88rem;
}

/* Upload Flow */

.event-flow {
  position: relative;
  display: grid;
  gap: 15px;
  margin-top: 42px;
}

.event-step {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: stretch;
  gap: 17px;
}

.event-step__number {
  display: grid;
  place-items: start center;
  padding-top: 26px;
  border-left: 1px solid var(--color-border);
  color: var(--color-site);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.77rem;
  font-weight: 900;
  direction: ltr;
}

.event-step__body {
  padding: 23px 25px;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: var(--color-surface);
  transition:
    border-color var(--transition),
    background var(--transition),
    transform var(--transition);
}

.event-step__body:hover {
  border-color: rgba(17, 155, 218, 0.25);
  background: var(--color-surface-hover);
  transform: translateX(-4px);
}

.event-step__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 13px;
  direction: ltr;
}

.event-step code {
  color: var(--color-text-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.86rem;
  font-weight: 800;
}

.event-direction {
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 800;
  white-space: nowrap;
}

.event-direction--request {
  background: rgba(59, 130, 246, 0.1);
  color: #75a7ff;
}

.event-direction--response {
  background: rgba(53, 201, 143, 0.1);
  color: #59d9a5;
}

.event-direction--storage {
  background: rgba(168, 85, 247, 0.1);
  color: #be83fa;
}

.event-step__body p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 2;
}

/* Todo */

.todo-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
}

.todo-grid span {
  padding: 10px 15px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 0.84rem;
  transition:
    color var(--transition),
    border-color var(--transition),
    background var(--transition),
    transform var(--transition);
}

.todo-grid span:hover {
  border-color: var(--color-border-active);
  background: rgba(17, 155, 218, 0.07);
  color: var(--color-site);
  transform: translateY(-2px);
}

/* Server */

.server-specs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.server-spec {
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-surface);
}

.server-spec__label {
  display: block;
  margin-bottom: 28px;
  color: var(--color-site);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  direction: ltr;
  text-align: right;
}

.server-spec strong {
  display: block;
  font-size: 2rem;
  direction: ltr;
  text-align: right;
}

.server-spec p {
  margin: 7px 0 0;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.capacity-banner {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  align-items: center;
  gap: 28px;
  margin-top: 20px;
  padding: 25px 28px;
  border-right: 3px solid var(--color-site);
  background: linear-gradient(
    to left,
    rgba(17, 155, 218, 0.09),
    transparent
  );
}

.capacity-banner__label {
  display: block;
  margin-bottom: 5px;
  color: var(--color-site);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  direction: ltr;
  text-align: right;
}

.capacity-banner strong {
  font-size: 1.1rem;
}

.capacity-banner p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.86rem;
}

/* Monitoring */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}

.metric-card {
  min-width: 0;
  padding: 25px;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background:
    linear-gradient(
      145deg,
      rgba(255, 255, 255, 0.045),
      rgba(255, 255, 255, 0.015)
    );
}

.metric-card__value {
  display: block;
  margin-bottom: 22px;
  color: var(--color-site);
  font-size: clamp(1.55rem, 4vw, 2.15rem);
  font-weight: 900;
  direction: ltr;
  text-align: right;
}

.metric-card strong {
  display: block;
  font-size: 0.9rem;
  direction: ltr;
  text-align: right;
}

.metric-card p {
  margin: 5px 0 0;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.insight-list {
  display: grid;
  gap: 0;
  margin: 38px 0 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
}

.insight-list li {
  display: grid;
  grid-template-columns: 45px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.insight-list__number {
  padding-top: 4px;
  color: var(--color-site);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  direction: ltr;
}

.insight-list p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* Roadmap */

.roadmap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}

.roadmap-item {
  padding: 25px;
  border: 1px solid var(--color-border);
  border-radius: 19px;
  background: var(--color-surface);
}

.roadmap-item:first-child {
  grid-column: 1 / -1;
}

.roadmap-item__status {
  display: inline-block;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(17, 155, 218, 0.1);
  color: var(--color-site);
  font-size: 0.67rem;
  font-weight: 900;
  direction: ltr;
}

.roadmap-item h3 {
  margin: 22px 0 9px;
  color: var(--color-text-primary);
  font-size: 1rem;
}

.roadmap-item p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.84rem;
  line-height: 1.9;
}

/* Gallery */

.gallery-grid {
  display: grid;
  grid-auto-rows: 240px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.gallery-item {
  position: relative;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: var(--color-surface);
  cursor: zoom-in;
}

.gallery-item--large {
  grid-row: span 2;
  grid-column: span 2;
}

.gallery-item--wide {
  grid-column: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition:
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    filter var(--transition);
}

.gallery-item span {
  position: absolute;
  right: 16px;
  bottom: 16px;
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.66);
  color: #ffffff;
  font-size: 0.72rem;
  opacity: 0;
  backdrop-filter: blur(9px);
  transform: translateY(8px);
  transition:
    opacity var(--transition),
    transform var(--transition);
}

.gallery-item:hover img {
  filter: brightness(0.75);
  transform: scale(1.035);
}

.gallery-item:hover span {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */

.project-footer {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  align-items: center;
  gap: 17px;
  margin-top: 70px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}

.project-footer__logo {
  width: 54px;
  height: 54px;
  object-fit: contain;
}

.project-footer strong {
  display: block;
}

.project-footer p {
  margin: 4px 0 0;
  color: var(--color-muted);
  font-size: 0.75rem;
  direction: ltr;
  text-align: right;
}

.project-footer a {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  transition:
    color var(--transition),
    border-color var(--transition);
}

.project-footer a:hover {
  border-color: var(--color-border-active);
  color: var(--color-site);
}

/* Mobile TOC */

.mobile-toc-backdrop {
  position: fixed;
  inset: 0;
  z-index: 29;
  background: rgba(0, 0, 0, 0.64);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-toc-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-toc {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 30;
  width: min(370px, 88vw);
  height: 100dvh;
  padding: 22px;
  overflow: hidden;
  border-left: 1px solid var(--color-border);
  background: rgba(4, 8, 12, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translateX(102%);
  transition: transform var(--transition);
}

.mobile-toc.is-open {
  transform: translateX(0);
}

.mobile-toc__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-toc__close {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
}

.mobile-toc__nav {
  max-height: calc(100dvh - 98px);
  overflow-y: auto;
  padding-left: 5px;
}

/* Lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 25px;
  visibility: hidden;
  opacity: 0;
  transition:
    opacity var(--transition),
    visibility var(--transition);
}

.lightbox.is-open {
  visibility: visible;
  opacity: 1;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(14px);
  cursor: zoom-out;
}

.lightbox__dialog {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr) 50px;
  align-items: center;
  gap: 14px;
  width: min(1180px, 100%);
  max-height: calc(100dvh - 50px);
  transform: scale(0.96);
  transition: transform var(--transition);
}

.lightbox.is-open .lightbox__dialog {
  transform: scale(1);
}

.lightbox__figure {
  min-width: 0;
  margin: 0;
  text-align: center;
}

.lightbox__image {
  width: 100%;
  max-height: calc(100dvh - 100px);
  margin: 0 auto;
  border-radius: 16px;
  object-fit: contain;
}

.lightbox__caption {
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
}

.lightbox__close {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 2;
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.58);
  color: #ffffff;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.lightbox__control {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  color: #ffffff;
  font-family: Arial, sans-serif;
  font-size: 2rem;
  cursor: pointer;
  transition:
    color var(--transition),
    border-color var(--transition),
    background var(--transition);
}

.lightbox__control:hover {
  border-color: var(--color-border-active);
  background: rgba(17, 155, 218, 0.1);
  color: var(--color-site);
}

.lightbox__control--previous {
  order: 1;
}

.lightbox__figure {
  order: 2;
}

.lightbox__control--next {
  order: 3;
}

/* Responsive */

@media (max-width: 1050px) {
  .page-shell {
    grid-template-columns: minmax(0, 1fr) 230px;
    gap: 38px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 30px;
  }

  .hero__logo-box {
    width: 145px;
    height: 145px;
    border-radius: 36px;
  }

  .hero__logo {
    width: 95px;
    height: 95px;
  }

  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .page-shell {
    display: block;
    width: min(840px, calc(100% - 28px));
    padding-top: 30px;
  }

  .desktop-toc {
    display: none;
  }

  .toc-open-btn {
    display: inline-flex;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat-card:nth-child(2) {
    border-left: 0;
  }

  .stat-card:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-border);
  }

  .architecture-flow {
    grid-template-columns: 1fr;
  }

  .architecture-connector {
    transform: rotate(90deg);
    text-align: center;
  }
}

@media (max-width: 700px) {
  .page-header {
    padding: 10px 12px 0;
  }

  .page-header__inner {
    min-height: 62px;
    padding: 0 4px;
  }

  .site-brand__name {
    display: none;
  }

  .header-btn {
    min-height: 40px;
    padding: 0 10px;
    font-size: 0.85rem;
  }

  .page-shell {
    width: min(100% - 24px, 840px);
    padding-bottom: 70px;
  }

  .hero {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 40px 0 55px;
  }

  .hero__visual {
    order: 1;
    justify-content: start;
    min-height: 120px;
    margin: auto;
  }

  .hero__content {
    order: 2;
  }

  .hero__logo-box {
    width: 108px;
    height: 108px;
    border-radius: 28px;
  }

  .hero__logo {
    width: 72px;
    height: 72px;
  }

  .hero__logo-glow {
    right: 0;
    width: 130px;
    height: 130px;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 15vw, 4.4rem);
  }

  .hero__description {
    font-size: 0.96rem;
    line-height: 2.05;
  }

  .hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  .hero__meta {
    justify-content: flex-start;
  }

  .content-section {
    padding: 62px 0;
  }

  .section-heading {
    gap: 12px;
  }

  .section-heading__index {
    padding-top: 6px;
  }

  .section-heading h2 {
    font-size: clamp(1.55rem, 8vw, 2.2rem);
  }

  .tech-grid,
  .server-specs,
  .metrics-grid,
  .roadmap,
  .security-grid {
    grid-template-columns: 1fr;
  }

  .roadmap-item:first-child {
    grid-column: auto;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 165px;
  }

  .capacity-banner {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .event-step {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
  }

  .event-step__number {
    padding-top: 22px;
  }

  .event-step__body {
    padding: 20px;
  }

  .event-step__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .gallery-grid {
    grid-auto-rows: 250px;
    grid-template-columns: 1fr;
  }

  .gallery-item--large,
  .gallery-item--wide {
    grid-row: auto;
    grid-column: auto;
  }

  .gallery-item span {
    opacity: 1;
    transform: none;
  }

  .project-footer {
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .project-footer__logo {
    width: 46px;
    height: 46px;
  }

  .project-footer a {
    grid-column: 1 / -1;
    text-align: center;
  }

  .lightbox {
    padding: 12px;
  }

  .lightbox__dialog {
    display: block;
  }

  .lightbox__control {
    position: fixed;
    top: 50%;
    z-index: 2;
    width: 42px;
    height: 42px;
    transform: translateY(-50%);
  }

  .lightbox__control--previous {
    right: 10px;
  }

  .lightbox__control--next {
    left: 10px;
  }

  .lightbox__image {
    max-height: calc(100dvh - 80px);
  }
}

@media (max-width: 420px) {
  .back-btn span:last-child,
  .toc-open-btn span:last-child {
    display: none;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-card:not(:last-child) {
    border-bottom: 1px solid var(--color-border);
    border-left: 0;
  }

  .stat-card {
    padding: 22px 18px;
  }

  .highlight-block {
    padding: 24px 20px;
  }

  .timeline-item {
    padding-right: 29px;
  }

  .insight-list li {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}


/* Icons */

.ui-icon {
  --icon-url: none;

  display: inline-block;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  background-color: currentColor;

  -webkit-mask-image: var(--icon-url);
  mask-image: var(--icon-url);
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-size: contain;
}

/* حذف رسم قدیمی آیکن‌ها */
.ui-icon::before,
.ui-icon::after {
  content: none;
}

/* Icon sources */

.ui-icon--back {
  --icon-url: url("assets/icons/arrow-back.svg");
}

.ui-icon--list {
  --icon-url: url("assets/icons/list.svg");
}

.ui-icon--close {
  --icon-url: url("assets/icons/close.svg");
}

.ui-icon--external {
  --icon-url: url("assets/icons/external-link.svg");
}

.ui-icon--down {
  --icon-url: url("assets/icons/chevron-down.svg");
}